Installation of concrete footings for piles and the like



R. B. TUFTS.

INSTALLATION 0F CONCRETE FOOTINGS FOR PILES AND THE LIKE. APPLICATION HLED APR.13. 1920.

n'ozncls Patented Nov. 8, 192i.

Unirse stares .PATENT FFEQE.

INSTALLATION or CONCRETE roofriiies son runs aim Tian Linn,

To aZZ whom t may concern:

Be it known that I, ROBERT B. TUr'rs, a citizen of the United States, and a resident of Kirkwood, in the county of Dekalb and State of Georgia, have invented certain new and useful improvements in installation of Concrete Footings for Piles 'and the like, and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in the installation of footings for concrete piles and the like,-one object of the invention being to provide a footing or foundation for a pre-formedl concrete pile in such manner that the same may be easily and quickly formed and established under the pile after the latter shall have been driven into the soil.

With this and other objects in view, the invention consists in certain novel features and method of procedure as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view illustrating a driven concrete pile, before the footing has been formed; Fig. 2 is a view showing the manner in which a space is provided under the bottom of the pile to permit the subsequent formation of the footing, and Fig. 3 is a view illustrating means employed for and the manner of forming and establishing the footing or foundation for the pile.

1 represents a re-cast concrete pile having suitable reinforcement 2 and a central longitudinal opening or bore 3 extending from end to end thereof, and in this opening, a metal tube 4 may be located to prevent particles of concrete enterin said opening. Before driving the pile, it is provided with a separate driving oint or block 5 of concrete or other material and pref eiably made tapering and havin a metal nose 6. This nose is provided with an internally threaded socket 7 to receive the threaded lower end of a rod 8 passing through the pipe or tube 4, said rod having a headed upper end 9 and serving to retain Speccaton of Letters Patent.

Application l'ed April 13,

Patented Nov. 8, 1921. i920. serial no. 373,495.

thedriving point or block 5 in position against the lower end of the pile while the latter is being driven.

lWhen the pile shall have been driven as shown in Fig. 1,' the rod 8 will be unscrewed from the driving point 5 and removed. A plunger 10 will then through the tube 4 and caused to engage the driving point. The plun er 10 will now be subjected to the action o ay driver, such as illustrated diagramm'atically at 11, for the purpose of forcing the driving point 5 downwardly from the lower end of the pipe and thus form a space 12 below the pile rThe plunger 10 will then be removed and the upper end of the longitudinal bore of the pile or, when the tube 4 is employed in the pile, the upper end of said tube will be connected by a pipe 13, with the outlet of a hopper 14. This hopper may be supported by suitable legs 15 on a boat or ioat 16 and itis provided at its top with an inlet opening adapted to be sealed air tight by a cover or door 17 The hopper 14 is connected by a pipe 18 having a valve 19, with a tank 20 of compressed air or other fluid pressure medium, Asuch as steam.

After charging the -hopper 14 with concrete or kindred material in semi-liquid form, the cover or door 17 will be tightly closed and then the contents of said hopper will be subjected to Huid pressure from the tank 20, by opening the valve 19 in pipe 18. Such fluid pressure will operate to force the concrete throu h the pipe 13 and throu h the tube 4 in t e pile to the space 12 un ei' the pile. As the earth into which the pile has been driven is soft, the wall of the space 12 will yield to the pressure of the concreteentering said space and as the pressure to which the semi-liquid concrete is subjected continues, the mass of concrete below and around the lower end of the pile will increase in size until a substantial concrete footing 21 for the lower end of the pile will be established.l

A small pipe 22 may be embedded in the concrete of the pile sor'that its lower end will communicate with the space 12 so as to provide means of escape of air which might be passed freely 8. The combination of a pre-east concrete end of the pile and the separated driving pile having a longitudinal bore, a separate member. driving member at the lower end of the pile, n testimony whereof I have signed this removable means insertible through the bore specification in the presence of two subscrib- 5 of the pile after the same and the driving ing witnesses.

member shall have been driven and operable to force the separate driving member d0wn- ROBERT B. TUF TS. wardly away from the lower end of the pile, Witnesses: and means for forcing concrete through the MARIE MAYNARD,

10 pile and into the space between the lower HENRY S. WILLIS. 

